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Used and Pre-Owned Zeiss Visante, Stratus and Cirrus OCTs and A-Scans IOL Masters

Welcome. Visionequip offers incredible savings and finance options on all pre-owned and used A-scans, Zeiss OCT’s and Heidelberg HRT’s. Flexible Financing Options, including $100.00 per month for the first 6 months on any equipment lease with buyout option, give you the ability to equip your practice and enhance cash flow. Call 888-783-7891 for details on this special ophthalmic equipment finance program.

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STRATUS OCT(tm) Optical Coherence Tomography

The pre-owned used STRATUS OCT(tm) is a diagnostic imaging device that provides direct cross sectional images of the retina for objective measurement and subjective clinical evaluation in the detection of glaucoma and retinal diseases. The STRATUSOCT(tm) images and analyzes macular thickness, the retinal nerve fiber layer and the optic disc using the latest technology for high resolution scans The Stratus OCT incorporates optical coherence tomography technology to provide comprehensive imaging and measurement of glaucoma and retinal disease. Stratus OCT is the gold standard in vivo imaging device for the posterior segment and offers proven reproducibility for disease management. The Stratus OCT provides real-time cross-sectional images and quantitative analysis of retinal features to optimize the diagnosis and monitoring of retinal disease and for enhanced pre- and post-therapy assessment. The device is beneficial for evaluation of cataract patients, pre- and post-operatively, and for the assessment of early signs of glaucoma and glaucomatous change. The Zeiss Stratus, Visante and Cirrus OCT come in various configurations. Please advise our sales department of your practice needs so we can place the right instrument for your facility.

The pre-owned used Zeiss GDx is clinically proven to accurately discriminate between healthy and glaucomatous eyes and to be predictive of visual field loss. The GDx Tracks change over time using The Advanced Serial Analysis feature helps you to evaluate subtle RNFL changes so you can manage glaucoma with more confidence. GDx examinations are easy for your patients and staff. Reports are clear and intuitive. Portablity allows you to move your GDx between offices . Fast exam time ranges from 1 to 3 minutes.

Pre Owned used HRT 2 Tomographer Heidelberg Retina Tomograph HRT 2 The Heidelberg Retina Tomograph II may be superior to other optic nerve head analyzers for accuracy in 3-dimensional optic nerve head topography. The retinal thickness measurements of the HRT Retina Module create a complete map of the scanned area without interpolating data. Compared to the Edema Index, Retinal Thickness maps may be more useful for tracking disease changes as therapy continues. The 3-D maps are helpful for showing and explaining retinal abnormalities to the patient. Software Modules will vary depending on instrument; please call with your requirements.

The pre owned used Zeiss IOLMaster (pre-owned used) is a non-contact optical device that measures the distance from the corneal vertex to the retinal pigment epithelium by partial coherence interferometry, the IOL Master is consistently accurate to within ±0.02 mm or better. The IOLMaster is Carl Zeiss Meditec's innovative solution for biometric measurement and preoperative computation of intraocular lens (IOL) power. Non-contact Optical Coherence Biometry revolutionizes measurement of the ocular axis and sets new standards for speed and accuracy.

COMPARISON OF SPECTRAL/FOURIER DOMAIN OPTICAL COHERENCE TOMOGRAPHY INSTRUMENTS FOR ASSESSMENT OF NORMAL MACULAR THICKNESS. Sull AC, Vuong LN, Price LL, Srinivasan VJ, Gorczynska I, Fujimoto JG, Schuman JS, Duker JS. From the *New England Eye Center, Tufts Medical Center, Boston, Massachusetts; daggerUniversity of Arkansas for Medical Sciences, Little Rock, Arkansas; double daggerDepartment of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts; and section signUniversity of Pittsburgh Medical Center Eye Center, Eye and Ear Institute, Pittsburgh, Pennsylvania. PURPOSE:: The purpose of this study was to report normal macular thickness measurements and assess reproducibility of retinal thickness measurements acquired by a time-domain optical coherence tomography (OCT) (Stratus, Carl Zeiss Meditec, Inc., Dublin, CA) and three commercially available spectral/Fourier domain OCT instruments (Cirrus HD-OCT, Carl Zeiss Meditec, Inc.; RTVue-100, Optovue, Inc., Fremont, CA; 3D OCT-1000, Topcon, Inc., Paramus, NJ). METHODS:: Forty randomly selected eyes of 40 normal, healthy volunteers were imaged. Subjects were scanned twice during one visit and a subset of 25 was scanned again within 8 weeks. Retinal thickness measurements were automatically generated by OCT software and recorded after manual correction. Regression and Bland-Altman plots were used to compare agreement between instruments. Reproducibility was analyzed by using intraclass correlation coefficients, and incidence of artifacts was determined. RESULTS:: Macular thickness measurements were found to have high reproducibility across all instruments with intraclass correlation coefficients values ranging 84.8% to 94.9% for Stratus OCT; 92.6% to 97.3% for Cirrus Cube; 76.4% to 93.7% for RTVue MM5; 61.1% to 96.8% for MM6; 93.1% to 97.9% for 3D OCT-1000 radial; and 31.5% to 97.5% for 3D macular scans. Incidence of artifacts was higher in spectral/Fourier domain instruments, ranging from 28.75% to 53.16%, compared with 17.46% in Stratus OCT. No significant age or sex trends were found in the measurements. CONCLUSION:: Commercial spectral/Fourier domain OCT instruments provide higher speed and axial resolution than the Stratus OCT, although they vary greatly in scanning protocols and are currently limited in their analysis functions. Further development of segmentation algorithms and quantitative features are needed to assist clinicians in objective use of these newer instruments to manage diseases. PMID: 19952997 [PubMed - as supplied by publisher]

Spectral domain optical coherence tomography in diabetic macular edema. Pournaras JA, Erginay A, Lazrak Z, Gaudric A, Massin P. Department of Ophthalmology, Hôpital Lariboisière, Assistance Publique-Hôpitaux de Paris, Université Paris 7, Paris, France. BACKGROUND AND OBJECTIVE: To compare the images obtained from Stratus time domain optical coherence tomography (OCT) (Carl Zeiss Meditec, Inc., Dublin, CA) and Cirrus spectral domain OCT (Cirrus HD-OCT 4000 model; Carl Zeiss Meditec, Inc.) in patients with diabetic macular edema. PATIENTS AND METHODS: This observational retrospective case series was created using the charts of 20 patients with diabetes mellitus diagnosed as having diabetic macular edema. All patients had both Stratus and Cirrus OCT imaging completed on the same day. Qualitative comparisons were performed by two experienced clinicians in an unmasked fashion. Central macular thickness and central foveal thickness were recorded. RESULTS: Thirty-six eyes of 20 patients with diabetes mellitus were analyzed. Features such as cystoid spaces, highly reflective lesions, vitreoretinal interface, serous retinal detachment, and photoreceptors inner/outer segments were more often detected with the Cirrus OCT than with the Stratus OCT. Considering the same reference lines for evaluation of central macular thickness and central foveal thickness, the same values were obtained with both devices. CONCLUSION: Cirrus OCT enables easier observation of normal structures and retinal abnormalities than the Status OCT. Furthermore, lesions may be accurately identified and quantified by the Cirrus OCT. Copyright 2009, SLACK Incorporated. PMID: 19928719 [PubMed - in process]

Torpedo maculopathy: in-vivo histology using optical coherence tomography. Tsang T, Messner LV, Pilon A, Lombardi L. Illinois Eye Institute, Illinois College of Optometry, Chicago, Illinois 60616, USA. PURPOSE: Recent reports of torpedo maculopathy have disclosed underlying irregularities within the chorioretinal tissue that have not been shown to induce disturbances in visual function. Optical coherence tomography (OCT) provides a unique means of assessing the chorioretinal organization and integrity of torpedo lesions in an in vivo setting that has yet to be explored. In agreement with reported cases, torpedo maculopathy appears to be a benign, non-progressive condition that subtends the horizontal raphe in the juxtafoveal region and imparts no disturbance in visual function. CASE REPORTS: Three cases of torpedo maculopathy were examined using Stratus OCT3 imaging (Carl Zeiss Meditec, Dublin, CA). OCT scans revealed intact, attenuated retinal layers with hyper-reflectivity of the retinal pigmented epithelium (RPE). The RPE subtending these lesions appears of normal thickness, yet, there is an abrupt transition between intact-organized and intact-disorganized retinal tissue in scans transitioning from normal retina to torpedo lesions. Our imaging studies revealed significant attenuation and disorganization of the inner and outer retinal layers overlying a hyper-reflective RPE, which was of normal thickness and devoid of any structural defects. CONCLUSIONS: An analysis of the OCT images collected suggests anomalies in retinal architecture. This finding implies that these lesions may represent atypical colobomas whereby retinal tissues are present but, perhaps, not fully developed. In light of these imaging studies, we propose that this uncommon condition may arise from deficits in cellular migration and/or organization. PMID: 19887969 [PubMed - in process]

Evaluation of anterior-segment inflammation and retinal thickness change following cataract surgery. Stock G, Ahlers C, Dunavoelgyi R, Kahraman G, Schauersberger J, Schmidt-Erfurth U, Amon M. Department of Ophthalmology, Medical University Vienna, Austria. Abstract. Purpose: To investigate the physiological retinal response to uneventful cataract surgery using conventional time-domain (TD-OCT) and current spectral-domain optical coherence tomography (SD-OCT) in combination with an assessment of the anterior chamber inflammatory reaction by laser flare/cell meter (LCFM). Methods: Thirty-four patients scheduled for cataract surgery were included in this prospective pilot study. Retinal parameters were examined according to a standardized examination procedure using TD-OCT (Stratus; Carl Zeiss Meditec, Dublin, California, USA) and SD-OCT (Cirrus; Carl Zeiss Meditec) devices. The inflammatory reaction of the anterior chamber was measured by LFCM (Kowa FC-1000, Kowa Co. Ltd, Tokyo, Japan). Examinations were carried out preoperatively and at day 2, week 1 and week 4 postoperatively. Results: A slight decrease of central retinal thickness values was identified at day 2 postoperatively followed by an increase of these parameters at week 4. LFCM showed peak values in all patients at day 2 postoperatively with a constant decrease at the following visits. No visible pathological retinal changes were seen after surgery. Conclusion: A biphasic retinal response after surgery could be shown with SD-OCT and TD-OCT technology. By using the advantages of rasterscanning mode, SD-OCT technology is superior to TD-OCT imaging in the investigation of the physiological retinal response to cataract surgery. PMID: 19878107 [PubMed - as supplied by publisher]